<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .c1{
            height: 300px;
            width: 50%;
        }
    </style>
</head>
<body>
    <div class="c1">在中国</div>
    <div>吃饭</div>

</body>
</html>